Post-cast strip steel force transmission rod deep foundation pit ring beam inner support structure

Abstract

The application discloses a deep and large foundation pit ring beam inner support structure of post-poured strip type steel force transmission rod, relates to the field of foundation pit support, and comprises a wall body, a basement negative second floor bottom plate, a negative first floor slab and a force transmission concrete beam assembly, type steel force transmission rod assemblies are arranged at the post-poured strips of the basement negative second floor bottom plate and the negative first floor slab, and the force transmission concrete beam assembly is arranged between the outer wall of the negative first floor slab and the support. The application is characterized in that a plurality of corresponding reinforcing plates are fixedly installed on the web and the bottom bar, so that the corresponding web and the bottom bar can be connected and fixedly installed, then the adjacent steel anchors are connected and fixed through a plurality of triangularly arranged connecting frames, the stability and firmness of the installation support can be further improved, the synchronous plate and the plurality of steel bars are fixedly installed in advance, so that the installation and fixation can be directly performed on site, and the stability and firmness of the positioning and installation can be further improved through the positioning groove and the positioning block.

Description

Technical Field

[0001] This application relates to the field of foundation pit support, and in particular to the internal support structure of the ring beam of a deep foundation pit with post-cast strip steel dowel bars. Background Technology

[0002] In recent years, internal support systems have been widely used in large-scale construction projects for deep foundation pit support. Many large deep foundation pits have adopted a combination of support piles and horizontal internal supports such as ring beams, bracing, and diagonal bracing, which has provided strong protection for the safety of the foundation pit.

[0003] A search revealed a Chinese patent with authorization announcement number CN217870523U, which discloses an internal support structure for a deep foundation pit ring beam with post-cast strip steel dowel bars. The structure includes a basement level 2 floor slab and a basement level 1 floor slab. Steel dowel bars are installed at the post-cast strips of both the basement level 2 floor slab and the basement level 1 floor slab. A frame beam is installed at the post-cast strip of the basement level 1 floor slab. A dowel bar beam is installed on one side of the frame beam. A plain concrete dowel strip is installed on the outer side of the basement level 2 floor slab.

[0004] The deep foundation pit ring beam internal support structure of the post-cast strip steel force transmission rod in the above patent has the following shortcomings: Although the device can ensure the stability of the foundation pit retaining structure when the support is removed, the use of the internal support structure makes the construction process more efficient, environmentally friendly and safe, and can meet the foundation pit construction requirements.

[0005] However, the steel anchors, top reinforcement, and bottom reinforcement of the device lack any components for further connection and reinforcement, resulting in poor stability and firmness during installation and use. This affects the subsequent support effect and the ease of installation and connection. Therefore, the stability, firmness, and ease of installation of the device can be further improved. Utility Model Content

[0006] To further improve the stability and ease of installation of the device, this application provides an internal support structure for the ring beam of a deep foundation pit with post-cast strip steel dowel bars.

[0007] The deep foundation pit ring beam internal support structure with post-cast strip steel dowel bar provided in this application adopts the following technical solution: The deep foundation pit ring beam internal support structure with post-cast strip steel dowel bar includes a wall, a basement second floor slab, a basement first floor slab, and a force-transmitting concrete beam assembly. The post-cast strip of the basement second floor slab and the basement first floor slab are provided with steel dowel bar assemblies, and the force-transmitting concrete beam assembly is set between the outer wall of the basement first floor slab and the support.

[0008] The steel dowel assembly includes steel anchors, end-retaining mesh fixing bars, stirrups, top bars, and bottom bars. The two ends of the steel anchors are respectively inserted into the two walls of the post-cast strip. The end-retaining mesh fixing bars are fixed at the junction of the steel dowel assembly and the wall. The stirrups are fixed at the bottom of the steel anchors. The top bars are fixedly installed on the top of the steel dowel assembly. The bottom bars are fixedly installed at the bottom of the steel dowel assembly. Corresponding reinforcing plates are fixedly fitted on the two top bars and the bottom bars. Two mounting holes for interlocking installation are symmetrically opened on the reinforcing plates. Corresponding connecting brackets are fixedly installed on the side of the two steel anchors that are close to each other.

[0009] By adopting the above technical solution, multiple corresponding reinforcing plates are fixedly installed on the top and bottom reinforcing bars, thereby connecting and fixing the corresponding top and bottom reinforcing bars. Then, multiple triangularly arranged connecting frames are used to connect and fix adjacent steel anchors, which can further improve the stability and firmness of the installation support.

[0010] Preferably, the force-transmitting concrete beam assembly includes a replacement support beam and a replacement crossbeam, the replacement crossbeam is fixed to the top surface of the replacement support beam, the bottom surface of the replacement support beam abuts against the exterior wall of the basement floor slab, and there are several replacement support beams.

[0011] By adopting the above technical solution, a plain concrete force transmission strip is set on the outer side of the second basement floor slab, and a force transmission concrete beam assembly is set between the outer wall and the support of the first basement floor slab, so that the basement beam and slab structure forms a whole and constitutes a new horizontal support, thus playing a supporting role.

[0012] Preferably, the side of the crossbeam away from the basement floor slab is provided with support piles.

[0013] By adopting the above technical solution, the support piles can be installed to provide support.

[0014] Preferably, the crossbeam is provided with multiple circular holes, and each of the multiple circular holes is provided with a corresponding reinforcing bar.

[0015] By adopting the above technical solution, the circular holes can be used to assist in the installation process.

[0016] Preferably, the top of the multiple reinforcing bars is fixedly installed with the same synchronous plate, and the top of the crossbeam is symmetrically provided with two positioning grooves, each of which is slidably installed with a corresponding positioning block, and both positioning blocks are fixedly installed with the synchronous plate.

[0017] By adopting the above technical solution, the positioning groove and positioning block can further enhance the positioning support and limiting function.

[0018] Preferably, the top of the crossbeam for changing supports is provided with an insertion hole, which extends through to the top of the synchronization plate.

[0019] By adopting the above technical solution and setting up sockets, an auxiliary installation function can be achieved.

[0020] Preferably, the insertion hole is provided with a threaded post, and a nut is screwed onto the threaded post.

[0021] By adopting the above technical solution, the synchronization plate can be fixed again through threaded posts and nuts, thus further improving the convenience of installation.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. This application employs a connecting frame and other components, with multiple corresponding reinforcing plates fixedly installed on the top and bottom reinforcing bars, thereby connecting and fixing the corresponding top and bottom reinforcing bars. Furthermore, multiple triangularly arranged connecting frames connect and fix adjacent steel anchors, further improving the stability and firmness of the installation support. By using synchronous plates and multiple reinforcing bars for pre-fixing, on-site construction allows for direct installation and fixing. The use of positioning grooves and positioning blocks further enhances the stability and firmness of the positioning installation.

[0024] 2. This application utilizes threaded posts and the like for cooperation, allowing the synchronization plate to be fixed again via the threaded posts and nuts, thus further improving the ease of installation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the internal support structure of the deep foundation pit ring beam with post-cast strip steel force transmission bar according to an embodiment of this application.

[0026] Figure 2 This is a partial unfolded schematic diagram illustrating the main embodiment of the support structure in this application;

[0027] Figure 3 This is a schematic diagram illustrating the main reinforced plate structure in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram illustrating the installation portion of the support structure, which is the main feature of this application embodiment.

[0029] Attached reference numerals: 1. Wall; 2. Top reinforcement; 3. Reinforcing plate; 4. Bottom reinforcement; 5. Edge reinforcement; 6. Steel anchor; 7. Connecting frame; 8. Stirrup; 9. Basement floor slab; 10. Basement floor slab; 11. Replacement support beam; 12. Replacement support beam; 13. Support pile; 14. Mounting hole; 15. Round hole; 16. Reinforcing bar; 17. Insertion hole; 18. Threaded column; 19. Nut; 20. Synchronous plate; 21. Positioning groove; 22. Positioning block. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0031] This application discloses an internal support structure for a deep foundation pit ring beam using post-cast strip steel force transmission rods.

[0032] Reference Figure 1-3 The deep foundation pit ring beam internal support structure with post-cast strip steel dowel rods includes a wall 1, a basement second basement floor slab 10, a basement first floor slab 9, and a dowel beam assembly. Steel dowel rod assemblies are provided at the post-cast strips of both the basement second basement floor slab 10 and the basement first floor slab 9. The dowel beam assembly is located between the outer wall and the support of the basement first floor slab 9. This application is a further optimization of a portion of the content described in the prior art, and the content not described is the prior art in this field. Therefore, this application does not fully describe the content described in this field.

[0033] The steel dowel assembly includes a steel anchor 6, a closing mesh fixing bar 5, a stirrup bar 8, a top bar 2, and a bottom bar 4. The two ends of the steel anchor 6 are inserted into the two walls 1 of the post-cast strip, the closing mesh fixing bar 5 is fixed at the junction of the steel dowel assembly and the wall 1, the stirrup bar 8 is fixed at the bottom of the steel anchor 6, the top bar 2 is fixedly installed on the top of the steel dowel assembly, and the bottom bar 4 is fixedly installed at the bottom of the steel dowel assembly. Corresponding reinforcing plates 3 are fixedly fitted on the two top bars 2 and the bottom bar 4. Two mounting holes 14 for interlocking installation are symmetrically opened on the reinforcing plates 3. Corresponding connecting brackets 7 are fixedly installed on the side of the two steel anchors 6 that are close to each other.

[0034] In use, steel dowel bars are installed at the post-cast strips of the second basement floor slab 10 and the first basement floor slab 9. In addition, the post-cast strip of the first basement floor slab 9 is equipped with a frame beam, and a dowel bar beam is installed on one side of the frame beam. C20 micro-expansion concrete is used for pouring. After the supports are removed, the micro-expansion concrete is removed (it can only be removed when it reaches 85% of the design strength), and the post-cast strip concrete is poured according to the design requirements.

[0035] Next, a plain concrete force-transfer strip is set on the outer side of the second basement floor slab 10, and a force-transfer concrete beam assembly is set between the outer wall of the first basement floor slab 9 and the support, so that the basement beam and slab structure forms a whole and constitutes a new horizontal support, thus playing a supporting role.

[0036] By fixing multiple corresponding reinforcing plates 3 on the top reinforcement 2 and bottom reinforcement 4, the corresponding top reinforcement 2 and bottom reinforcement 4 can be connected and fixed. Then, multiple triangularly arranged connecting frames 7 are used to connect and fix adjacent steel anchors 6, which can further improve the stability and firmness of the installation support.

[0037] Reference Figure 2-4 The force-transmitting concrete beam assembly includes a replacement support beam 11 and a replacement crossbeam 12. The replacement crossbeam 12 is fixed on the top surface of the replacement support beam 11. The bottom surface of the replacement support beam 11 abuts against the outer wall of the basement floor slab 9. There are several replacement support beams 11. A support pile 13 is provided on the side of the replacement crossbeam 12 away from the basement floor slab 9. Multiple round holes 15 are opened on the replacement crossbeam 12, and corresponding steel bars 16 are provided in each of the multiple round holes 15.

[0038] Among them, the top of multiple steel bars 16 is fixedly installed with the same synchronous plate 20, and the top of the support beam 12 is symmetrically opened with two positioning grooves 21. The corresponding positioning blocks 22 are slidably installed in the two positioning grooves 21. The two positioning blocks 22 are fixedly installed with the synchronous plate 20. The top of the support beam 12 is provided with an insertion hole 17, which extends through to the top of the synchronous plate 20. The insertion hole 17 is provided with a threaded post 18, and a nut 19 is screwed onto the threaded post 18.

[0039] In use, the synchronous plate 20 is pre-fixed with multiple steel bars 16, so that it can be directly installed and fixed on site. The positioning groove 21 and positioning block 22 can further enhance the positioning support and limiting function. The synchronous plate 20 can be fixed again by the threaded column 18 and nut 19, thus further improving the convenience of installation.

[0040] The implementation principle of the deep foundation pit ring beam internal support structure of the post-cast strip steel dowel bar in the embodiment of this application is as follows: When in use, steel dowel bar assemblies are set at the post-cast strip of the second basement floor slab 10 and the first basement floor slab 9. In addition, the post-cast strip of the first basement floor slab 9 is equipped with a frame beam, and a dowel bar beam is set on one side of the frame beam. C20 micro-expansion concrete is used for pouring. After the support is removed, the micro-expansion concrete is removed (it can only be removed when it reaches 85% of the design strength), and the post-cast strip concrete is poured according to the design requirements.

[0041] Next, a plain concrete force-transfer strip is set on the outer side of the second basement floor slab 10, and a force-transfer concrete beam assembly is set between the outer wall of the first basement floor slab 9 and the support, so that the basement beam and slab structure forms a whole and constitutes a new horizontal support, thus playing a supporting role.

[0042] By fixing multiple corresponding reinforcing plates 3 on the top reinforcement 2 and bottom reinforcement 4, the corresponding top reinforcement 2 and bottom reinforcement 4 can be connected and fixed. Then, multiple triangularly arranged connecting frames 7 are used to connect and fix adjacent steel anchors 6, which can further improve the stability and firmness of the installation support. By using the synchronous plate 20 and multiple steel bars 16 for pre-fixed installation, it can be directly installed and fixed during on-site construction. The positioning groove 21 and positioning block 22 can further improve the positioning support and limiting function. The synchronous plate 20 can be fixed again by the threaded column 18 and nut 19, thus further improving the convenience of installation.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A deep foundation pit ring beam internal support structure with post-cast steel dowel bars, comprising a wall (1), a basement second-floor slab (10), a basement first-floor slab (9), and a dowel beam assembly, characterized in that: Steel force transmission rod assemblies are provided at the post-pouring strips of the basement second basement floor slab (10) and the basement first basement floor slab (9), and the force transmission concrete beam assembly is set between the outer wall and the support of the basement first basement floor slab (9). The steel dowel assembly includes a steel anchor (6), a closing mesh fixing bar (5), a stirrup bar (8), a top bar (2), and a bottom bar (4). The two ends of the steel anchor (6) are respectively inserted into the two walls (1) of the post-cast strip. The closing mesh fixing bar (5) is fixed at the junction of the steel dowel assembly and the wall (1). The stirrup bar (8) is fixed at the bottom of the steel anchor (6). The top bar (2) is fixedly installed on the top of the steel dowel assembly. The bottom bar (4) is fixedly installed at the bottom of the steel dowel assembly. Corresponding reinforcing plates (3) are fixedly fitted on both top bars (2) and bottom bars (4). Two mounting holes (14) for interlocking installation are symmetrically opened on the reinforcing plates (3). Corresponding connecting frames (7) are fixedly installed on the side of the two steel anchors (6) that are close to each other.

2. The deep foundation pit ring beam internal support structure with post-cast strip steel dowel bar as described in claim 1, characterized in that: The force-transmitting concrete beam assembly includes a replacement support beam (11) and a replacement crossbeam (12). The replacement crossbeam (12) is fixed to the top surface of the replacement support beam (11). The bottom surface of the replacement support beam (11) abuts against the outer wall of the basement floor slab (9). There are several replacement support beams (11).

3. The deep foundation pit ring beam internal support structure with post-cast strip steel dowel bar as described in claim 2, characterized in that: The support beam (12) is provided with support piles (13) on the side away from the first basement floor slab (9).

4. The deep foundation pit ring beam internal support structure with post-cast strip steel force transmission rod according to claim 3, characterized in that: The crossbeam (12) has multiple round holes (15), and each of the round holes (15) contains a corresponding steel bar (16).

5. The deep foundation pit ring beam internal support structure with post-cast strip steel dowel bar as described in claim 4, characterized in that: The top of the multiple steel bars (16) is fixedly installed with the same synchronous plate (20). The top of the crossbeam (12) is symmetrically provided with two positioning grooves (21). The two positioning grooves (21) are each slidably installed with corresponding positioning blocks (22). The two positioning blocks (22) are fixedly installed with the synchronous plate (20).

6. The deep foundation pit ring beam internal support structure with post-cast strip steel dowel bar as described in claim 5, characterized in that: The top of the crossbeam (12) is provided with a socket (17), which extends through to the top of the synchronization plate (20).

7. The deep foundation pit ring beam internal support structure with post-cast strip steel dowel bar as described in claim 6, characterized in that: The insertion hole (17) is provided with a threaded post (18), and a nut (19) is screwed onto the threaded post (18).

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